<?php

declare(strict_types=1);

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\BelongsToMany;

class Client extends Model
{
    /**
     * 客户状态常量
     */
    public const STATUS_ACTIVE = 'active';
    public const STATUS_INACTIVE = 'inactive';

    /**
     * 有效的状态列表
     */
    public const VALID_STATUSES = [
        self::STATUS_ACTIVE,
        self::STATUS_INACTIVE,
    ];

    protected $table = 'clients';

    protected $fillable = [
        'name',
        'llm_provider_id',
        'rate_limit',
        'timeout',
        'status',
    ];

    protected $casts = [
        'rate_limit' => 'integer',
        'timeout' => 'integer',
        'status' => 'string',
    ];

    public function llmProvider(): BelongsTo
    {
        return $this->belongsTo(LlmProvider::class);
    }

    public function admins(): BelongsToMany
    {
        return $this->belongsToMany(Admin::class, 'admin_client')
            ->withTimestamps();
    }

    /**
     * 检查客户是否处于活跃状态
     */
    public function isActive(): bool
    {
        return $this->status === self::STATUS_ACTIVE;
    }

    /**
     * 检查是否可以发送LLM请求
     */
    public function canSendLlmRequest(): bool
    {
        return $this->isActive() && $this->llmProvider->isActive();
    }
}